@misc{indiciae4de48853e77a, title = {Pertussis notification.}, author = {G De Cean and M Levy}, year = {1990}, doi = {10.5694/j.1326-5377.1990.tb126178.x}, url = {https://pubmed.ncbi.nlm.nih.gov/2215349/}, note = {Source identifier: 2215349} }